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Business Segment Information (Tables)

3 Months Ended

Mar. 31, 2021

Segment Reporting Information, Additional Information [Abstract]

Schedule of Segment Reporting Information, by Segment

Segment information was as follows (in thousands):

Total assets (net of intercompany eliminations) as of:			March 31, 2021						December 31, 2020
Electric Utilities			$	3,217,474					$	3,120,928
Gas Utilities			4,900,939						4,376,204
Power Generation			406,742						404,220
Mining			76,097						77,085
Corporate and Other			94,947						110,349
Total assets			$	8,696,199					$	8,088,786

Three Months Ended March 31, 2021			External Operating Revenue									Inter-company Operating Revenue									Total Revenues
			Contract Customers			Other Revenues						Contract Customers			Other Revenues
Segment:
Electric Utilities			$	220,500		$	137					$	6,771		$	—					$	227,408
Gas Utilities			398,499			2,408						1,520			92						402,519
Power Generation			4,241			421						24,451			50						29,163
Mining			6,977			249						7,106			340						14,672
Inter-company eliminations			—			—						(39,848)			(482)						(40,330)
Total			$	630,217		$	3,215					$	—		$	—					$	633,432

Three Months Ended March 31, 2020			External Operating Revenue									Inter-company Operating Revenue									Total Revenues
			Contract Customers			Other Revenues						Contract Customers			Other Revenues
Segment:
Electric Utilities			$	167,503		$	223					$	6,413		$	—					$	174,139
Gas Utilities			354,287			5,708						778			—						360,773
Power Generation			1,855			443						23,612			56						25,966
Mining			6,564			467						7,839			335						15,205
Inter-company eliminations			—			—						(38,642)			(391)						(39,033)
Total			$	530,209		$	6,841					$	—		$	—					$	537,050

						Three Months Ended March 31,
									2021			2020
Adjusted operating income:
Electric Utilities									$	21,813		$	35,650
Gas Utilities									102,094			102,897
Power Generation									14,269			11,349
Mining									3,261			3,129
Corporate and Other									(3,122)			160
Operating income									138,315			153,185
Interest expense, net									(37,600)			(35,453)
Impairment of investment									—			(6,859)
Other income (expense), net									266			2,353
Income tax (expense)									(494)			(16,002)
Net income									100,487			97,224
Net income attributable to noncontrolling interest									(4,171)			(4,050)
Net income available for common stock									$	96,316		$	93,174

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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599

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- References

No definition available.

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